Tommy

Here is my answer to puzzle 1:

Repeat 5 [arcr 180 20 right 180]




Experimentation with spiral:

growby 3% 2000 [
rotate 180 [
spin (80) [
color red [line -171 134 -4 5]
color yellow [line 185 134 2 6]
color blue [line -169 -128 -3 3]
color hsb (240 - index2/2000*240) 100 100 [line 181 -138 5 7]
]
]
]